The party system is tyrannous and the type of people who sign up to them are just as bad.
From the guardian.co.uk
Our founding fathers just finished fighting for independence from a tyrannous, oppressive ruler.
From the forbes.com
Empires are always tyrannous, but not always despotic.
From the economist.com
As a rule, I don't approve of dress codes at all and fancy dress is a more tyrannous one even than smart casual.
From the telegraph.co.uk
The majority ought not to be tyrannous.
From the economist.com
Unfortunately, the tyrannous impulse never dies.
From the denverpost.com
The play itself is a baggy affair that pits Danton, a life-loving revolutionary, against the hypocritical and tyrannous Robespierre.
From the bloomberg.com
He himself said so, especially when complaining that he had been forced to paint the Sistine, instead of getting on with the tomb for his tyrannous, charismatic patron, Pope Julius II.
From the time.com
The quest for justice turns into a messianic mission for the protagonist who comes to be viewed by other villagers as a man who is tasked with liberating them from the tyrannous hands.
From the en.wikipedia.org
More examples
Oppressive: marked by unjust severity or arbitrary behavior; "the oppressive government"; "oppressive laws"; "a tyrannical parent"; "tyrannous disregard of human rights"